19. (3 pts) Which of the following statements is false regarding the periodic table of the elements? A. Most nonmetallic elements are on the right side of the chart B. Most metallic elements are on the left side of the chart C. Z increases from right to left D. Atomic radius decreases from left to right in the same period of the chart E. all these statements are true 20. (3 pts) We learned that mixtures can be separated by taking advantage of their physical property differences. What physical property (-ies) could you use to separate a mixture of diesel fuel and gasoline? A. boiling point B. density C. magnetism D. hardness E. particle size 21. (3pts). In your own words, why are Noble Gases noble